Evilution Polyrhythmic Fill — Derek Roddy (Monstrosity) Drum Lick | MetalForge
Learn the Evilution Polyrhythmic Fill drum lick by Derek Roddy of Monstrosity. From Slaves and Masters (Evilution (1996)). Before joining Hate Eternal, Derek Roddy was the drummer on Monstrosity's seminal Evilution (1996), ...
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1. Derek Roddy's Signature Licks — Before joining Hate Eternal, Derek Roddy was the drummer on Monstrosity's seminal Evilution (1996), an album that stands as one of the most technically demanding Florida death-metal recordings of the decade. It was on Evilution that Roddy first demonstrated the full range of his polyrhythmic vocabulary to a wider audience: not just the blast beats and double bass that defined the genre, but the ability to construct fills and transitions that moved across multiple rhythmic layers simultaneously, placing accents against the pulse in ways that felt complex without losing the forward momentum of the groove. The Evilution-era polyrhythmic fill is a demonstration of how Roddy thinks rhythmically — not in terms of simple on-beat or off-beat placement, but in terms of grouped strokes that imply independent meters within a single flow. The fill pattern works by dividing a bar into two or more overlapping groups that do not share a common downbeat: for example, a group of five and a group of seven strokes laid across a bar of four, so that the accents fall in places the listener does not expect while the underlying beat continues to resolve on schedule. What makes this difficult is maintaining the pulse internally while the surface of the playing moves against it — the hands have to be counting something different from what the kick and hi-hat are doing, and the transition in and out of the fill has to be smooth enough that the groove does not stumble when the polyrhythm resolves. Roddy's fills on Evilution are technically extraordinary, but they are also musical: the polyrhythms serve the song's energy by building tension and releasing it at the right structural moments. For drummers studying polyrhythmic technique, the Evilution-era fill is an ideal case study because it bridges the gap between academic polyrhythm theory and practical death-metal application. Begin by learning the stroke groupings in isolation, counting out loud and clapping the pattern before touching a kit. Add the kick on the downbeat of every bar while you practise the fill pattern, so the polyrhythm lands in context. Work slowly and deliberately — polyrhythmic fills are one of the few places in drumming where slow practice is non-negotiable, because the internal subdivision must be completely internalised before it can be executed cleanly at speed.2. Derek Roddy Profile — Divide the bar into overlapping stroke groups that imply independent meters Maintain the internal pulse count while the fill moves against it on the surface Place accents across the polyrhythm so the tension resolves cleanly at the bar line Count the stroke groupings aloud before touching the kit — internalise before executing Practise the transition into and out of the fill so the groove resumes without stumbling
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